var vm = new Vue({
    el:"#app",
    data(){
        return {
            name:"xxx",
            firstName:"aaa",
            lastName:"bbb",
        }
    },
    created: function(){
        console.log("created");
    },
    methods:{

    },
    computed:{
        fullName: function () {
            return this.firstName+"."+this.lastName;
        }
    },
    mounted: function () {
        console.log("mounted");
    }

});